Friction and metal plug for rubber heels, &amp;c.



F. BERENSTEH FRlCTlON AND METAL PLUG. FGR Russ CR HEELS, 6w,

APPLICATION FILED APiLQI. 19x5.

Patented 11m: 28, 1916.

SEW :01

marrn STATES PATENT OFFICE.

FRANK BERENSTEIN, OF CHELSEA, MASSACHUSETTS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO PANTHER RUBBER MANUFACTURING COMPANY, OF STOUGHTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

FRICTION AND METAL PLUG FOR RUBBER HEELS, &c.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Original application filed June 18, 1915, Serial No. 34,784. Patent No. 1,155,874, dated October 5, 1915.

Divided and this application filed August 27, 1915.

To all whom it may concern:

Be it known that I, FRANK BERENSTEIN, a citizen of the United States, resident of Chelsea, in the county of Suffolk and State of Massachusetts, have made a certain new and useful Invention in Friction and Metal Plugs for Rubber Heels, &c.; and I declare 'the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it appertains to make and use the invention, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

I igure l is a plan view. of a heel having the invention applied thereto. Fig. 2 is a section on the line 2-2, Fig 1. Fig. 3 is a detail sectional view of the back plate, showing the fastening device or nail in engagement therewith. Fig. 4 is a detail perspective view of the back plate and band. Fig. 5 is a detail perspective view of a modified back plate. Fig. (3 is a plan view of the blank for a further modified back plate provided with radial lugs. Fig. 7 is a detail sectional view of the same bent up into form and the ends of the lugs turned inward. Fig. 8 is a plan view of the blank for a further modified form of back plate having radial lugs of flaring form. Fig. is a detail sectional view of the same bent up into form. Fig. 10 is a detail perspective view of the canvas plug. Fig. 11 is a fragmentary detail sectional view showing the ragged edges of the holes forming clutch means of engagement-with the canvas plug.

The invention has relation to a friction and metal plug for rubber heels and other tread surfaces, having for its object certain improvements upon the Patent No. 1,129,672, Feb. 323, 1915, of S. J. l'larris, the object being to accomplish the same results with greater economy of manufacture, as, in the case of the patent referred to, the dies and the plugs themselves are too expensive.

This is a division of application S. No. 34.78 patented October 5, 1915.

The invention consists in the novel construction and combinations of parts, as hereinafter set forth.

Serial No. 47,667.

In the accompanying drawings, illustrating the invention, the numeral 2 designates the wear lift of the rubber heel to which the invention is shown as applied, and 3 the upper lift of said heel.

The plug, in the present case, consists of a back plate or metal frame plate 4, usually of circular form, of about the same diameter as that of the plug proper, 5, wound from a strip of frictionized canvas or other suitable rubber-coated material, means being provided exterior-1y of the plug for holding the plug in position in its seat in the heel, said means consisting preferably of an exterior circular band or hollow cylinder 6, surrounding the plug and having means for engagement with the plug, as points 7, 7, struck inward from said band into the plug, to hold the plug in its place in the heel at all times, said band being turned down from "said back plate, asda part thereof. The circular-band may be provided'with a number of perforations S, 8 therein, which, in the vulcanization, will admit the rubber of the heel proper and the rubber of the canvas plug, to hold the circular band in place, said hand in its turn having engagement with the plug, to hold the plug in place.

The entire device may be made in thinibleor shallow dish form, with one stroke of a die, said die forming pcrfo 'ations not only in the circular band or flange of the thimble but also in the back plate thereof.

The plug, in the present case, is not provided with a metal post or lining, as in the patent, the fastening nail having its head engaged directly with the central perforatio'n'of the hollow cylindrical plug, and

its shankicngagod with the center perforation of the metal back plate.

The perforation of the back plate is of smaller size than that of the plug, and is prov ded with a marginal portion overlying the top of the perforation of the plug and adapted to be engaged by and backing up the head of said nail.

in Fig. 6 of the drawings a modification of the invention is shown wherein the hollow cylinder or band is omitted or is cut away, to provide radial projections or lugs 9, extending down at right-angles to the back plate and having engagement with the canvas plug, to hold it in place, said engagement being effected by clutch pointsIG;

struck inward from said lugs to enter the plug, 'or by turning the points of the lugs into engagement with the plug, or by the rubber of the heel proper and the rubber 0f the coated plug flowing into the per forations 11 of said lugs and effecting a rubber lock. The clutch points are conveniently made when the perforations are struck into the device, leaving ragged or rough edges upon the inside.

The metal back plate and the hollow cylinder or band may be either perforated or not, as desired. This is also true of the modification having the. radial lugs.

I claim:

In a rubber heel having a recess, a hollow cylindrical plug of rubber-coated fabric material located within and cemented to the side walls of said recess, a metal back plate extending across and having bracing engagenient with the top of said plug, the interior diameter of said plug being comparatively large, to receive the head of a fastening device, and said back plate having a central perforation of small size to receiye the shank of said device, the marginal portion of said plate surrounding the central perforation thereof across the cavity of the plug and acting as a backing for the head of said device, and metallic means forming an integral part of said back plate located exteriorly of and engaging said plug to hold it in place.

In testimony whereof I afiiX my signature, in presence of two Witnesses.

FRANK BERENSTEIN. \Vitnesses MAURICE Toner, DAVID A. LOUKIE,

extending 

